280500253 has 4 divisors (see below), whose sum is σ = 306000288. Its totient is φ = 255000220.

The previous prime is 280500247. The next prime is 280500263. The reversal of 280500253 is 352005082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280500253 - 2²⁵ = 246945821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280500263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12750001 + ... + 12750022.

It is an arithmetic number, because the mean of its divisors is an integer number (76500072).

Almost surely, 2^280500253 is an apocalyptic number.

It is an amenable number.

280500253 is a deficient number, since it is larger than the sum of its proper divisors (25500035).

280500253 is a wasteful number, since it uses less digits than its factorization.

280500253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25500034.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 280500253 is about 16748.1417775227. The cubic root of 280500253 is about 654.6026399386.

The spelling of 280500253 in words is "two hundred eighty million, five hundred thousand, two hundred fifty-three".